01

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Maria notices that when she opens the window, her papers blow around the room.
How does that happen?

02

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What is air?
How do you know whether it’s just empty space? Give some evidence from everyday life?

03

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Build a fan that can make a breeze to blow over a paper tower.

04

Program your fan to make a breeze, starting with the speed set to 100%.

SPIKE Essential Matter - en-au

05

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Use your model to try to blow over the paper tower.

06

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Try different positions for the paper tower, like in front of the fan, on one side of it and closer or farther away.

07

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Does the position change how well the fan works to blow over the tower?

08

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Use your model to explain how your fan can move air particles.

09

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Use your model to explain how your fan can blow over a paper tower without touching it.

10

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Use cardboard or other materials to design a better fan blade and then test again to see what happens.

11

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Great job!